import Vue from 'vue'
import Router from 'vue-router'

Vue.use(Router)

/* Layout */
import Layout from '@/layout'

/**
 * Note: sub-menu only appear when route children.length >= 1
 * Detail see: https://panjiachen.github.io/vue-element-admin-site/zh/guide/essentials/router-and-nav.html#%E9%85%8D%E7%BD%AE%E9%A1%B9
 *
 * hidden: true                   当设置 true 的时候该路由不会在侧边栏出现（默认 false）
 * alwaysShow: true               若你想不管路由下面的 children 声明的个数都显示你的根路由，你可以设置 alwaysShow: true，这样它就会忽略之前定义的规则，一直显示根路由
 *                                当你一个路由下面的 children 声明的路由大于1个时，自动会变成嵌套的模式--如组件页面,
 *                                只有一个时，会将那个子路由当做根路由显示在侧边栏--如引导页面
 * redirect: noRedirect           当设置 noRedirect 的时候该路由在面包屑导航中不可被点击
 * name:'router-name'             设定路由的名字，一定要填写不然使用<keep-alive>时会出现各种问题
 * meta : {
    roles: ['admin','editor']     设置该路由进入的权限，支持多个权限叠加
    title: 'title'                设置该路由在侧边栏和面包屑中展示的名字
    icon: 'svg-name'/'el-icon-x'  设置该路由的图标，支持 svg-class，也支持 el-icon-x element-ui 的 icon
    noCache: true                 如果设置为true，则不会被 <keep-alive> 缓存(默认 false)
    breadcrumb: false             如果设置为false，则不会在breadcrumb面包屑中显示(默认 true)
    affix: true                   若果设置为true，它则会固定在tags-view中(默认 false)
    activeMenu: '/example/list'   当路由设置了该属性，则会高亮相对应的侧边栏
  }
 */

/**
 * constantRoutes
 * 代表那些不需要动态判断权限的路由，如登录页、404、等通用页面
 */
export const constantRoutes = [
  {
    path: '/redirect',
    component: Layout,
    hidden: true,
    children: [
      {
        path: '/redirect/:path(.*)',
        component: () => import('@/views/redirect/index')
      }
    ]
  },

  {
    path: '/login',
    component: () => import('@/views/login/index'),
    hidden: true
  },

  {
    path: '/auth-redirect',
    component: () => import('@/views/login/auth-redirect'),
    hidden: true
  },
  {
    path: '/404',
    component: () => import('@/views/error-page/404'),
    hidden: true
  },
  {
    path: '/403',
    component: () => import('@/views/error-page/403'),
    hidden: true
  },
  {
    path: '/401',
    component: () => import('@/views/error-page/401'),
    hidden: true
  },

  {
    path: '/',
    component: Layout,
    redirect: '/dashboard',
    children: [{
      path: 'dashboard',
      name: 'Dashboard',
      component: () => import('@/views/dashboard/index'),
      meta: { title: '系统首页', icon: 'el-icon-s-home', affix: true }
    }]
  }

]

/**
 * asyncRoutes
 * the routes that need to be dynamically loaded based on user roles
 */
export const asyncRoutes = [
  {
    path: '/permission',
    component: Layout,
    redirect: '/permission/page',
    alwaysShow: true, // will always show the root menu
    name: 'Permission',
    meta: {
      title: 'Permission',
      icon: 'lock',
      roles: ['admin', 'editor'] // you can set roles in root nav
    },
    children: [
      {
        path: 'page',
        component: () => import('@/views/permission/page'),
        name: 'PagePermission',
        meta: {
          title: 'Page Permission',
          roles: ['admin'] // or you can only set roles in sub nav
        }
      },
      {
        path: 'directive',
        component: () => import('@/views/permission/directive'),
        name: 'DirectivePermission',
        meta: {
          title: 'Directive Permission'
          // if do not set roles, means: this page does not require permission
        }
      },
      {
        path: 'role',
        component: () => import('@/views/permission/role'),
        name: 'RolePermission',
        meta: {
          title: 'Role Permission',
          roles: ['admin']
        }
      }
    ]
  },

  // 404 page must be placed at the end !!!
  { path: '*', redirect: '/404', hidden: true }
]

const createRouter = () => new Router({
  mode: 'hash', // require service support
  scrollBehavior: () => ({ y: 0 }),
  routes: constantRoutes
})

const router = createRouter()

// Detail see: https://github.com/vuejs/vue-router/issues/1234#issuecomment-357941465
export function resetRouter() {
  const newRouter = createRouter()
  router.matcher = newRouter.matcher // reset router
}

export default router
